Combined electric incandescent lamp and reflector.



c. P. LAWSON. COMBINED ELECTRIC INOANDESOENT LAMP AND REFLECTOR.

APPLICATION FILED MAR. 10, 1914. 7

1,127,903. 7 V Patented Feb.9,1915.

) CHARLES P. LAWSON. OF BROCTON, NEW YORK.

COMBINED ELECTRIC IN CANDESCENT LAMP AND REFLECTOR.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed March 10, 1914. Serial No. 823,734.

To all whom it may concern:

Be it known that I, CHARLES P. LAWSON, a citizen of the United States of America, and resident of Broct on, in the county of .Chautauqua and State of New York, have on its outer surface, so that the said coatingwill act as a reflector and coact with the internally positioned reflector, so that the efliciency of the lamp may be increased and the illuminating effect thereof augmented.

A stilL further object of the invention is to provide a novel lamp, the configuration of which increases the effective reflecting surface as compared with lamps now in ordinary use without materially increasing the cost of production.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference' will be had to the accompanying drawings, forming part of this specification wherein like characters denote corresponding parts in the several views, and in which Figure 1 illustrates a view in elevation, the same being broken away to show the interior construction of the internal reflector; and Fig. 2 illustrates a sectional view through the film support.

lamp head threadedto fit in a screw socket or the head may be otherwise formed. The globe or glass part 2 of the lamp is secured to the head as in ordinary construction and the said globe or glass part of the lamp is here shown as of the ordinary pear shaped I In these drawings l denotes the ordinary container for the filament and intermediate the length ofthe said glass portion a circumferentially hollow flange 3 is formed, the same being integral with the other portion of the body. As shown in the drawing, the flange is produced by the formation of a series of compound curves and that portion designated by the numeral 4 has its under surface preferably concaved and the general contour of the said flange is slightly depend ing. The external surface of the body is coated with reflecting material 5, such as quick-silver, the said coating extending from the head and terminating at the lower edge of the flange so that the upper portion of the lamp constitutes a reflector, and by reason of the provision of the flange the area covered by the reflector is relatively greater than by the use of lamps of ordinary construction.

The filament support 6 within the lam constitutes a reflector and consists of a sha t or column extending downwardly from the head, the said column being hollow and the external surface thereof being flared from the head for a portion of its length, the said external surface being then tapered to the lower end and terminating in apoint by reason of which shadows are obviated.

The external surface of the filament support 6. has longitudinally disposed ribs or corrugations 7 acting as prisms for diffusing light and the internal surface of the filament support has a coating 9 of quick-silver or other material having qualities of reflection so that the same will reflect the light and coact with the reflector of the body.

The film 8 may be of any appropriate type and is shown as secured to the filament support in known manner.

It will be observed that the post having reflecting means herein described may be used in lamps other than those described herein.

' I claim In an incandescent electric lamp, a head,

a body attached thereto, said lamp body having a .compound curve intermediate its length forming a flange, the under surface of the said flange being concaved, a reflecting coating on the outer surface ,of the body extending from the head to the flan e thereof, afilament support depending .rom' the head, said filament support being flared for In testimony whereof, I aflix my signature a portion of its length and tapered to the in the presence of two witnesses.

lower end and terminating in a point ribs 0n the outer surface of the filament support, CHARLES R LAWSON 5 said filament support being hollow, and re- Witnesses:

fleeting material coating the internal sur- I PEARL A. PUTNAM,

face of the filament support. Lo'rrm E. BARKLEY. 

